Dental mixing-mortar.



UNITED STATE-s Patented August 25, 1903.

kCHARLES P. SCHULTZ, OF PAWTUOKET, RHODE ISLAND.

DENTAL MIXING-MORTAR.

SPECIFICATION forming part of Letters Patent N o. 737,287, dated August 25, 1903. Applicatitn filed December 4. 1902. Serial No. 133.935. (No model.)

To all whom, it may concern.-

Be it known that I, CHARLES P. SCHULTZ, a citizen of the United States, residing at Pawtucket, in the State of Rhode Island, have invented a new and useful Improvement in Dental Mixing-Mortars, of which the following is a specification.

In triturating and mixing amalgam and other plastic dental fillings as heretofore per formed a small cup-formed mortar has been employed in the use of which the'mixture becomes spread and adheres to the inner side and bottom of the mortar in a thin layer, and

in order to gather this into a convenient form for use an additional instrument has to be employed to scrape the mixturefrom the mortar and pestle,'and one of the advantanges of my improved mixing-mortar consists in the fact that the mixture is so confined in a tube as to be operated upon in a space commensurate with the small quantities of material usually employed for the purpose, the size of an ordinary filling seldom exceeding that of a pea, and by confining the mass in a space just large enough for its proper manipulation the trituration and mixing'of the materials is greatly facilitated.

Another advantage of my improvement consists in the fact that the quantity of the substances in the mixing-mortar can be readily determined by means `of a graduated scale marked on the surface of the mortar, whereby the employment of special means for measuring such quantities is rendered unnecessary.

In the accompanying drawings, Figure 1 represents the side elevation of the tube of a a removable stopper. Y

vaxial section of the same with the pest-le remixing mortar embodying my invention. Fig. 2 represents an axial section showing the pestle in position for use with the lower end of the tube of the mortarclosed by means of Fig. 3 represents an moved and both ends of the tube closed by means of. removable Stoppers. Fig. 4. represents a side View of the pestle removed from the mortar. mixing end of the pestle. Fig. 6 represents a view of the beating end of the pestle. Fig. 7 represents an axial section showing the combination of the glass tube of the mortar with an outer casing. Fig. 8 represents a side view Fig. 5 represents a view of the shaped, the opposite ends of the tube being provided with suitable removable Stoppers.

In the drawings, A represents a tube made of glass or other transparent material, provided at its opposite ends with the Haring apertures b b, to which the stoppers c` c arefitted. The bore d of the tube A is made of uniform diameter, and the body portion e of the pestle B is made to loosely it the bore d. One end of the pestle is provided with the chisel-shaped mixing-head fand the opposite end with the beating-head g. The tube A is also provided with the graduation j, by means of which the quantity of material introduced into the mortar may be readily determined.

In operating with my improved mixingmortar the lower end of the tube A is to be closed with the stopper c, which thus constitutes the removable bottom of the mortar. The ingredients to be mixed and triturated are thento be conveyed through the flaring aperture b at the upper end ot the tube A into the said tube, the necessary quantities for the mixture being observed and determined by means of the graduated scale j, marked on the outer lsurface of the tube. The wedge-shaped head f of the pestle B is then inserted into the upper end of the tube A, and by operating the same against the sides of the tube and in the direction of the bottom stopper c, which forms the ioor of the mortar, the trituration. and mixing may be performed, and in accordance with the quality and texture of the substances to be operated upon either the wedgeshaped head f or the beating-head g may be'used in connection with the removable bottom stopper c, Vand when it is desirable to reverse the ends of the mortar during the operation the pestle B is to be withdrawn and the open upper end of the tube closed by means of astopper c, as shown in Fig. 2, so aste prevent the spilling of the contents of the tube during its reversal end for end, and after reversing the ends of' IOO reinsertion of the pestle B and the operation of mixing and trituration continued, the reversal of the mortar end for end being performed as often as required, and by this means that portion of the material first deposited at the bottom of the mortar, and therefore most distant from the action of the pestle, is by the turning of the mortar brought to the upper surface and into direct contact With the head of the pestle, and the trituration and mixing of the mass by this means will be more quickly and thoroughly performed than when operated upon from one side only. The Whole mass after being triturated and mixed forms a homogeneous lump, which as such can be readily removed upon the removal of the stopper c, which forms the oor of the mortar. The tube A may be provided with a protective casing C, of metal or other suitable material, as shown in Fig. 7, the said casing being provided with side openings 7c k, through which the graduations fj may be observed, and the tube A instead of being provided with funnel-shaped aperto res at both of its ends may be provided with but one funnel-shaped aperture, the other aperture beingyof the diameter of the bore of the tube, the said ends being provided with suitable removable stoppers, as shown in Fig. 9.

I claim as my inventionl. In a tubular mixing-mortar, the combination of a glass tube provided with a daring openingv at one of its ends, with removable end-closing means, whereby the ends of the mortar may be reversed and the mass contained therein be alternately operated upon at the opposite ends of the mortar.

2. In a mixing-mortar, the combination of the tube provided with a flaring aperture at one of its ends, and a removable stopper for closing the opposite end, with the pestle provided at one end With the chisel-shaped mixing-head, and at the other with the beatinghead.

CHARLES P. SGHULTZ. Witnesses:

SOCRATES SCHOLFIELD, ARNOLD E. HUGHES. 

